The difference between ΔH and ΔE is _________. that one refers to the system and one refers to the surroundings the change in temperature of the system the amount of pressure-volume work done by the system the change in mass of the system

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

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Q: Why do elements always have ΔH∘f=0? a) The standard state of elements is the reference point for…

A: •Given:- Here is question is asking that why ∆H°f always zero for elements.

Q: A 52.1 g sample of polystyrene is put into a calorimeter (see sketch at right) that contains 300.0 g…

A: In the process, the polystyrene will release the heat. The water will absorb the heat from the…

Q: A 55.6 g sample of glass is put into a calorimeter (see sketch at right) that contains 300.0 g of…

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Q: A 56.0 g sample of brass is put into a calorimeter (see sketch at right) that contains 100.0 g of…

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Q: A 55.8 g sample of glass is put into a calorimeter (see sketch at right) that contains 300.0 g of…

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Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

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Q: A 434.5 g sample of water at 20.0 °C is mixed with 100.0 g of a certain metal at 95.0 °C. After…

A: to find Cp for this metal use this above ,Heat lost by the metal = heat gained by the water Given…

Q: A 150.0-g sample of a metal at 67.0°C is added to 150.0 g of H₂O at 20.0°C. The temperature of the…

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Q: Calculate the quantity of energy (kJ) transferred to the calorimeter. ΔT = 2.14 °C qwater = 5.37 kJ

A: Calorimetry is a powerful tool used to quantify heat transfer in various processes, providing…

Q: Energy change is the sum of heat and work:  ΔE = q + w.  Work is calculated by: w = -PΔV What is…

A: Given, a reaction absorbs heat =40.3 J =+40.3 J and volume of gas increases from 0.250 L to 0.750…

Q: Determine the amount of heat (in kJ) associated with the production of 5.91 x 10 g of ammonia…

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Q: A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 69 J…

A: Given data,Step 1:Heat(Q)=69JWork(w)=-34J(-ve sign represent work is done on the system)Step…

Q: Zinc metal reacts with hydrochloric acid according to the following reaction: % Zn (s) + HCI (aq) →…

A: The reaction given is, Given: Mass of Zn reacting = 0.9807 g. Concentration of HCl = 0.250 M Volume…

Q: An 80.0 g sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was…

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Q: Measurements show that the energy of a mixture of gaseous reactants increases by 369. kJ during a…

A: We have to calculate the change in enthalpy and nature of reaction.

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 391kJ during a…

A: According to the question,The enthalpy of a mixture of gaseous reactants is increased by ΔH = 391…

Q: Zinc metal reacts with hydrochloric acid according to the balanced chemical equation.  Zn(s) + 2…

A: Given mass of Zn = 0.103 g volume of solution = 50 ml density of solution = 1g/ml standard value.…

Q: substance initially at 181.6 °C is placed in 35.0 mL of water initially at 25.0 °C and the system is…

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Q: Measurements show that the energy of a mixture of gaseous reactants increases by 397. kJ during a…

A: The energy difference between the products and reactants is known as the energy change of a…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

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Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A:

Q: A hot 115.8115.8 g lump of an unknown substance initially at 181.3181.3 °C is placed in 35.0 mL of…

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Q: A 50.5 g sample of polystyrene is put into a calorimeter (see sketch at right) that contains 200.0 g…

A: Given: Mass of polystyrene = 50.5 g = mpTi of polystyrene = 85.4 ◦C = TpSpecific heat of polystyrene…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 238. kJ during a…

A: The objective of the question is to calculate the change in energy of the gas mixture during the…

Q: thermometer A 54.0 g sample of aluminum is put into a calorimeter (see sketch at right) that…

A: Given data of the following experiment--- Aluminum---- m=54.0 g, T1=90.2℃ , T2=30.7 ℃ Cp for Al = ?…

Q: A system does 506 kJ of work and loses 271 kJ of heat to the surroundings. What is the change in…

A: Please find your solution below : According to First Law of Thermodynamics, heat can neither we…

Q: The specific heat capacities for four different substances are shown below. If the same amount of…

A: Specific heat capacity is a term used in thermodynamics and it is characteristic of a particular…

Q: A 53.1 g sample of aluminum is put into a calorimeter (see sketch at right) that contains 100.0 g of…

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Q: A piece of iron (mass = 25.0 g) at 398 K is placed in a styrofoam coffee cup containing 25.0 mL of…

A: Given,Mass of iron (m1) = 25 gInitial temperature of iron (Ti) = 398 KSpecific heat capacity of iron…

Q: A system does 551 kJ of work and loses 216 kJ of heat to the surroundings. What is the change in…

A: Given Data : 1. Work done (W) = -551KJ 2. Heat to the surroundings (Q) = -216 KJ Work done by the…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A:

Q: A 52.7 g sample of aluminum is put into a calorimeter (see sketch at right) that contains 150.0 g of…

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Q: An ideal gas is enclosed in a piston-cylinder apparatus with the piston being freely movable. Given…

A: Given process,         ΔE is positive and ΔH is negative.

Q: 140.0-g sample of water at 25.0°C is mixed with 126.1 g of a certain metal at 100.0°C. After thermal…

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Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 209. kJ during a…

A: Decrease in Energy of gaseous reactant  = ∆E = -209 kJ Work done = -104 kJ Change in enthalpy of gas…

Q: Which of the following is a statement of Hess's law?     If a reaction is carried out in a series of…

A: Thermodynamics is branch of chemistry in which we deal with amount of heat absorbed or evolved…

Q: A 56.5 g sample of aluminum is put into a calorimeter (see sketch at right) that contains 100.0 g of…

A: Given, For aluminium mass of aluminum (maluminum) = 56.5 g Specific heat capacity of aluminium…

Q: The decision of whether to use gas, oil, electricity, or wood to heat your home comes from many…

A: Thermodynamics is branch of chemistry in which we deal with amount of heat evolved or absorbed by…

Q: A piece of iron (mass = 25.0 g) at 368 K is placed in a styrofoam coffee cup containing 25.0 ml of…

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